41,043 people (2024 Census estimate, −0.3% since 2020)
828 square miles of land · 50 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
21 active community water systems list Clatsop County in the area they serve, reporting 39,821 people served in all (a system that crosses county lines counts its whole population).
| ASTORIA, CITY OF surface water · local government · OR4100055 | 10,181 served |
| WARRENTON, CITY OF surface water · local government · OR4100932 | 9,100 served |
| SEASIDE WATER DEPARTMENT surface water · local government · OR4100799 | 7,482 served |
| YOUNGS RIVER LEWIS & CLARK WD surface water · local government · OR4100062 | 2,580 served |
| KNAPPA WATER ASSOCIATION groundwater · private · OR4100061 | 1,800 served |
| GEARHART WATER DEPARTMENT buys surface water · local government · OR4100318 | 1,780 served |
| CANNON BEACH, CITY OF groundwater · local government · OR4100164 | 1,710 served |
| WICKIUP WATER DISTRICT surface water · private · OR4100063 | 1,630 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 55 people were held in Clatsop County's jail, in Vera's latest figure (2023), or 224 per 100,000 residents ages 15–64. In 2018 it was about 61.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
4 school districts have their office in Clatsop County. School taxes are usually the largest part of a property tax bill.
Spent $32 million — $25.9 million to run schools, about $17,427 per student, plus $2 million on buildings and equipment. Money in: $27.9 million local (mostly property tax), $2.6 million state, $1.8 million federal. Long-term debt: $97.9 million.
Spent $17.9 million — $16.3 million to run schools, about $16,556 per student, plus $453,000 on buildings and equipment. Money in: $8.5 million local (mostly property tax), $8 million state, $1.7 million federal. Long-term debt: $39.5 million.
Spent $11.4 million — $9.3 million to run schools, about $20,419 per student, plus $1.4 million on buildings and equipment. Money in: $4.2 million local (mostly property tax), $5.5 million state, $849,000 federal. Long-term debt: $14 million.
Spent $11.6 million — $6 million to run schools, about $50,966 per student, plus $5.5 million on buildings and equipment. Money in: $1.6 million local (mostly property tax), $5.2 million state, $769,000 federal.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively High compared with other U.S. counties. FEMA estimates natural hazards cost Clatsop County about $145.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
155 bridges in Clatsop County: 50 in good condition, 97 fair, and 8 poor (5.2%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| US101 (HWY 9) over Columbia River · built 1966 | 9,117 vehicles a day |
| Hwy 105 over Old Youngs Bay · built 1921 | 7,781 vehicles a day |
| W BROADWAY over NECANICUM RV · built 1924 | 7,315 vehicles a day |
| Hwy 105 over Lewis & Clark River · built 1924 | 6,367 vehicles a day |
| Hwy 485 over Skipanon River · built 1929 | 6,271 vehicles a day |
| US101 (Hwy 9) over Arch Cape Creek · built 1937 | 5,508 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $6.9 million of work in Clatsop County in fiscal 2025, about $168 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Oregon are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Clatsop County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Clatsop County built: brayden.ozark@gmail.com.
More of Oregon: the state government and every county in Oregon.
Nearby counties: Wahkiakum County, WA (23 mi) · Columbia County (30 mi) · Pacific County, WA (37 mi) · Tillamook County (39 mi) · Washington County (44 mi) · Cowlitz County, WA (51 mi).